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View Full Version : Downgrade 2011 iMac per loaded with mountain lion back to lion or snow leopard?




aPple nErd
Feb 21, 2013, 11:42 AM
Can it be done?



robbieduncan
Feb 21, 2013, 11:48 AM
Find it here (http://www.everymac.com/systems/apple/imac/index-imac.html) (two specs of 2011 iMacs exist). Oldest version you can install is pre-installed Mac OSX.

aPple nErd
Feb 21, 2013, 09:29 PM
So basically, the ones preloaded with lion, I can downgrade to sl, but the Mtn lion ones can only be on mountain lion?

robbieduncan
Feb 22, 2013, 05:19 AM
So basically, the ones preloaded with lion, I can downgrade to sl, but the Mtn lion ones can only be on mountain lion?

That sounds likely: if a machine has only ever shipped with ML then any previous OS won't have platform drivers for that machine and won't be able to boot.